package org.gy.T4;

import org.gy.T4.c.Student1;


public class Student1Test {
    public static void main(String[] args) {
        Student1 s1 = new Student1();
        Student1 s2 = new Student1("张三");
        System.out.println(s1.age);
        System.out.println(s2.age);
    }
}
